DEFINITIONS
The lithosphere is broken into a number of plates
What are Lithospheric plates?
A strong earthquake is caused by a sudden slip on a fault
What causes earthquake?
Dormant Volcano
Dormant volcanoes no longer produce eruptions, but might again sometime in the future
Focus
What is the origin of the seismic energy?
Magma
Hot, Liquid rock found deep below Earth's surface
The forces that work on the surface of the earth
What do you mean by Exogenic Forces?
The point on the earth's surface directly above the hypocenter
What is epicenter?
Where in the world are three quarters of the world's active volcanoes found?
Underwater
Longitudinal Waves
P waves
Volcanoes that have had recent eruptions or are expected to have eruptions in the near future.
Active volcanoes
The forces which act in the interior of the earth
What do you mean by Endogenic Forces?
Richter scale
On what scale is the magnitude of the earthquake determined?
Hot Spot
A hot spot occurs when magma breaks through the thinner parts of Earth's crust.
Surface Waves
L waves
About 75 percent of the world’s volcanoes are found around ______________ basin.
Pacific Ocean
A vent (opening) in the earth’s crust through which molten material erupts suddenly
What is a volcano?
The seismograph
Which machine is used to measure an earthquake?
Volcanic Lava
Magma bursts through onto Earth's surface as a bright orange liquid
S Waves
Transverse waves
Extinct volcanoes
Volcanoes that will likely never erupt again
The shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.
What do you mean by earthquake?
P waves, S waves, Surface waves
The sequence of waves that arrives from first to last.
On what planet is the tallest volcano in the Solar System?
Mars
Greatest damage is usually closest to the ___________
Epicenter
Ring of Fire
A line of volcanic activity that surrounds the Pacific Ocean basin is the Ring of Fire.